import Vditor from '../src/method'
import '../src/assets/less/index.less'

const outlineElement = document.getElementById('outline')
const previewElement = document.getElementById('preview')

document.querySelector('.markdown-list').
  addEventListener('click', function (event) {
    if (event.target.tagName === 'SPAN') {
      render(event.target.getAttribute('data-file'))
    }
  })

previewElement.addEventListener('click', function (event) {
  if (event.target.tagName === 'IMG') {
    Vditor.previewImage(event.target, 'zh_CN',
      outlineElement.classList.contains('dark') ? 'dark' : 'classic')
  }
})

const render = (fileName) => {
  fetch(`/demo/markdown/${fileName}.md`).
    then(response => response.text()).
    then(markdown => {
      Vditor.preview(previewElement, markdown, {
        markdown: {
          toc: true,
          listStyle: fileName === 'cute-list',
        },
        speech: {
          enable: true,
        },
        anchor: 1,
        after () {
          if (window.innerWidth <= 768) {
            return
          }
          Vditor.outlineRender(previewElement, outlineElement)
          if (outlineElement.innerText.trim() !== '') {
            outlineElement.style.display = 'block'
          }
        },
        lazyLoadImage: 'https://unpkg.com/vditor/dist/images/img-loading.svg',
        renderers: {
          renderHeading: (node, entering) => {
            const id = Lute.GetHeadingID(node)
            if (entering) {
              return [
                `<h${node.__internal_object__.HeadingLevel} id="${id}" class="vditor__heading"><span class="prefix"></span><span>`,
                Lute.WalkContinue]
            } else {
              return [
                `</span><a id="vditorAnchor-${id}" class="vditor-anchor" href="#${id}"><svg viewBox="0 0 16 16" version="1.1" width="16" height="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a></h${node.__internal_object__.HeadingLevel}>`,
                Lute.WalkContinue]
            }
          },
        },
      })
    })
}

render('zh_CN')
window.setTheme = (theme) => {
  if (theme === 'dark') {
    Vditor.setCodeTheme('native')
    Vditor.setContentTheme('dark',
      'https://unpkg.com/vditor/dist/css/content-theme')
    outlineElement.classList.add('dark')
    document.querySelector('html').style.backgroundColor = '#2f363d'
  } else {
    Vditor.setCodeTheme('github')
    Vditor.setContentTheme('light',
      'https://unpkg.com/vditor/dist/css/content-theme')
    outlineElement.classList.remove('dark')
    document.querySelector('html').style.backgroundColor = '#fff'
  }
}
